CN115616440A

CN115616440A - Impedance measuring system

Info

Publication number: CN115616440A
Application number: CN202110808938.6A
Authority: CN
Inventors: 黄康; 陈益莹
Original assignee: Triple Win Technology Shenzhen Co Ltd
Current assignee: Triple Win Technology Shenzhen Co Ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2023-01-17
Also published as: TWI799974B; US20230012533A1; TW202305381A; US11624763B2

Abstract

The invention provides an impedance measuring system for measuring the impedance between conductive pins of a product, which comprises: the relay board comprises a plurality of relay groups, each relay group comprises a first channel, a second channel, a third channel and a fourth channel, the first channel, the second channel, the third channel and the fourth channel are electrically connected with one conductive pin of a product and can be independently opened and closed, the relay board further comprises a first voltage interface, a second voltage interface, a first current interface and a second current interface, the first voltage interface is electrically connected with the first channel, the first current interface is electrically connected with the second channel, the second voltage interface is electrically connected with the third channel, and the second current interface is electrically connected with the fourth channel; the measuring instrument is used for measuring impedance and is electrically connected with the first voltage interface, the second voltage interface, the first current interface and the second current interface.

Description

Impedance measuring system

Technical Field

The present invention relates to the field of impedance measurement, and in particular, to an impedance measurement system.

Background

In the process of detecting electrical anomalies of a product, an open-short circuit test is usually performed to verify whether a tested PIN (PIN) is short-circuited with other PINs or whether the tested PIN is open-circuited. At present, the common practice of open-short circuit test is to measure the impedance between every two PINs of the product by using a handheld multimeter. Obviously, when a product has multiple PINs, the number of times that the measurement is needed is increased, which results in inefficiency, and it is easy for misconnection to occur, which results in measurement errors.

Disclosure of Invention

Accordingly, there is a need for an impedance measurement system that avoids the need to manually switch between different conductive pins frequently to measure impedance.

An embodiment of the present invention provides an impedance measuring system for measuring impedance between conductive pins of a product, the impedance measuring system including:

the relay board comprises a plurality of relay groups, each relay group comprises a first channel, a second channel, a third channel and a fourth channel, the first channel, the second channel, the third channel and the fourth channel are all used for being electrically connected to one conductive pin of the product, the first channel, the second channel, the third channel and the fourth channel can be independently opened and closed, the relay board further comprises a first voltage interface, a second voltage interface, a first current interface and a second current interface, the first voltage interface is electrically connected with the first channel, the first current interface is electrically connected with the second channel, the second voltage interface is electrically connected with the third channel, and the second current interface is electrically connected with the fourth channel;

and the measuring instrument is electrically connected with the first voltage interface, the second voltage interface, the first current interface and the second current interface.

Optionally, each relay group includes an odd relay and an even relay, the first channel and the second channel form the odd relay, and the third channel and the fourth channel form the even relay.

Optionally, the impedance measuring system includes a control unit, the control unit is configured to control opening and closing of the first channel, the second channel, the third channel, and the fourth channel of each of the relay groups, and the control unit opens only one odd relay and one even relay of another relay group at a time, and closes the other odd relays and the even relays.

Optionally, the product includes at least a first pin and a second pin, when impedance measurement is performed between the first pin and the second pin, the control unit switches two channels, opens the odd number relay of the relay group electrically connected to the first pin during first switching, simultaneously opens the even number relay of the relay group electrically connected to the second pin, closes the even number relay of the relay group electrically connected to the first pin and the odd number relay electrically connected to the second conductive pin, opens the even number relay of the relay group electrically connected to the first pin during second switching, simultaneously opens the odd number relay of the relay group electrically connected to the second pin, and closes the odd number relay electrically connected to the first pin and the even number relay electrically connected to the second conductive pin.

Optionally, the number of the conductive pins is n, and the control unit is configured to perform n × n (n-1) channel switching to obtain n × n (n-1) impedance data, where n is a positive integer greater than or equal to 2.

Optionally, the impedance measuring system further includes a display unit for displaying the tested impedance data.

Optionally, the impedance measuring system includes an adapter plate electrically connected between the relay board and the product, the adapter plate has a plurality of pin sockets, each pin socket is used for accommodating one conductive pin of the product, and each pin socket is further electrically connected to the first channel, the second channel, the third channel, and the fourth channel.

Optionally, the impedance measuring system further includes a fixing mechanism for fixing the relay board and the interposer.

Optionally, the measuring instrument is an impedance analyzer.

Optionally, the control unit is a computer.

Compared with the prior art, the invention at least has the following beneficial effects: through the setting of the relay board with multiple channels, repeated switching wiring among different conductive pins is effectively avoided, the measurement efficiency is improved, and the possibility of measurement errors is reduced.

Drawings

Fig. 1 is a block diagram of an impedance measuring system according to an embodiment of the invention.

Fig. 2 is a schematic connection diagram of an interposer according to an embodiment of the present invention.

Fig. 3 is another block diagram of an impedance measuring system according to an embodiment of the invention.

Fig. 4 is a schematic diagram of impedance data according to an embodiment of the invention.

Description of the main elements

Impedance measuring system 1000

Relay board 100

Relay set 110

Odd number relay 120

First channel 121

Second passage 122

Even number relay 130

Third channel 131

Fourth channel 132

First voltage interface 140

First current interface 150

Second voltage interface 160

Second current interface 170

Measuring instrument 200

Product 300

First conductive lead 310

Second conductive pin 320

Third conductive pin 330

Adapter plate 400

Pin socket 410

Control unit 500

Display unit 600

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

It will be understood that when an element is referred to as being "electrically connected" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "electrically connected" to another element, it can be connected by contact, e.g., wires, or by contactless connections, e.g., by contactless couplings.

In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, an impedance measuring system 1000 for measuring impedance between conductive pins of a product 300 is provided. The impedance measuring system 1000 at least comprises: relay board 100 and meter 200.

The relay board 100 includes a number of relay groups 110. Each of the relay sets 110 includes a first channel 121, a second channel 122, a third channel 131, and a fourth channel 132. The relay board 100 further comprises a first voltage interface 140, a second voltage interface 160, a first current interface 150 and a second current interface 170. The first voltage interface 140 and the first current interface 150 are positive interfaces, and the second voltage interface 160 and the second current interface 170 are negative interfaces.

The first voltage interface 140 is electrically connected to the first channel 121. The first current interface 150 is electrically connected to the second channel 122. The second voltage interface 160 is electrically connected to the third channel 131. The second current interface 170 is electrically connected to the fourth channel 132.

The meter 200 is used to measure impedance. The first voltage interface 140, the second voltage interface 160, the first current interface 150 and the second current interface 170 are electrically connected to the measuring instrument 200. Specifically, the measuring apparatus 200 may be an apparatus capable of measuring parameters such as resistance, capacitance, inductance, and the like, and may be an impedance analyzer, for example.

It is to be understood that, for convenience of description, the operation principle of the impedance measuring system 1000 is described in detail in this embodiment by taking the product 300 including three conductive pins (e.g., the first conductive pin 310, the second conductive pin 320, and the third conductive pin 330) as an example. In actual measurement, the number of the relay sets 110 should be greater than or equal to the total number of the conductive pins of the product 300.

During testing, the first conductive pin 310, the second conductive pin 320, and the third conductive pin 330 are electrically connected to one relay set 110, for example, the first channel 121, the second channel 122, the third channel 131, and the fourth channel 132 of the relay set 110.

It is understood that by providing the relay sets 110 with multiple channels and electrically connecting each relay set 110 to one of the conductive pins of the product 300, whether the corresponding conductive pin is connected to the loop of the impedance measurement can be independently controlled by opening and closing the channel of each relay set 110. Therefore, repeated switching wiring among different conductive pins of the product 300 is effectively avoided, the measurement efficiency is improved, and the possibility of measurement errors is reduced.

In the present embodiment, each of the relay sets 110 includes an odd relay 120 and an even relay 130. The first channel 121 and the second channel 122 constitute the odd relay 120, and the third channel 131 and the fourth channel 132 constitute the even relay 130.

Referring to fig. 1, the impedance measuring system 1000 further includes a control unit 500 for controlling the relay board 100 to switch channels. One end of the control unit 500 is electrically connected to the relay board 100, and the other end is electrically connected to the meter 200. The control unit 500 may be, for example, a computer, an industrial personal computer, or the like having the above control function. The control unit 500 controls to open the channels of two of the relay groups 110 electrically connected to two conductive pins to be tested and to close the channels of the other relay groups 110 at each switching, and only opens the odd relays 120 of one of the relay groups 110 and the even relays 130 of the other relay group 110 at each measurement.

It can be understood that, by switching the control unit 500 each time to open only two channels of the relay set 110 electrically connected to two conductive pins to be measured, and to close the channels of the other relay sets 110, two different conductive pins can be switched into the loop of the impedance measurement each time according to the measurement requirement. And the impedance between every two conductive pins can be measured through multiple times of switching.

With continued reference to fig. 1, the control unit 500 switches channels twice when performing impedance measurement between the first conductive pin 310 and the second conductive pin 320. When switching for the first time, the control unit 500 controls to open the odd relay 120 of the relay set 110 electrically connected to the first conductive pin 310, simultaneously open the even relay 130 of the relay set 110 electrically connected to the second conductive pin 320, and close the even relay 130 of the relay set 110 electrically connected to the first conductive pin 310 and the odd relay 120 of the relay set 110 electrically connected to the second conductive pin 320. Thus, the first voltage interface 140, the first channel 121 electrically connected to the first conductive pin 310, the second conductive pin 320, the third channel 131 electrically connected to the second conductive pin 320, and the second voltage interface 160 form a first loop to measure the voltage between the first conductive pin 310 and the second conductive pin 320. Meanwhile, the first current interface 150, the second channel 122 electrically connected to the first conductive pin 310, the second conductive pin 320, the fourth channel 132 electrically connected to the second conductive pin 320, and the second current interface 170 form a second loop to supply a test current between the first conductive pin 310 and the second conductive pin 320, where the test current is provided by the measuring instrument 200. Thus, based on the voltage measured by the first loop and the test current (dividing the measured voltage by the test current), the impedance between the first conductive pin 310 and the second conductive pin 320 can be obtained.

When switching for the second time, the control unit 500 controls to open the even number relay 130 of the relay group 110 electrically connected to the first conductive pin 310, simultaneously open the odd number relay 120 of the relay group 110 electrically connected to the second conductive pin 320, and close the odd number relay 120 of the relay group 110 electrically connected to the first conductive pin 310 and the even number relay 130 of the relay group 110 electrically connected to the second conductive pin 320. Thus, the first voltage interface 140, the first channel 121 electrically connected to the second conductive pin 320, the first conductive pin 310, the third channel 131 electrically connected to the first conductive pin 310, and the second voltage interface 160 form a first loop to measure the voltage between the first conductive pin 310 and the second conductive pin 320. The first current interface 150, the second channel 122 electrically connected to the second conductive pin 320, the first conductive pin 310, the fourth channel 132 electrically connected to the second conductive pin 320, and the second current interface 170 form a second loop to supply a test current between the first conductive pin 310 and the second conductive pin 320, where the test current is provided by the measurement instrument 200. The impedance between the second conductive pin 320 and the first conductive pin 310 can be obtained according to the voltage measured by the first loop and the test current (the measured voltage is divided by the test current).

It is understood that the first connection (first-switching circuit connection) and the second connection (second-switching circuit connection) are not strictly sequential, and in another embodiment, the order of the two connections may be reversed.

Similarly, when the impedance measurement is performed between the first conductive pin 310 and the third conductive pin 330, the control unit 500 still switches the channels twice, and the specific process is similar to the impedance measurement performed between the first conductive pin 310 and the third conductive pin 330, and is not described herein again.

It will be appreciated that if devices such as diodes, transistors and MOS transistors are included between two of the conductive pins, then two measurements are necessary when measuring impedance, since these devices all have unidirectional conductivity, and the impedance values measured by making two circuit connections as shown by the first and second switches described above are different. For example, when measuring the first conductive pin 310 and the second conductive pin 320, the first connection connects the positive terminal of the measuring apparatus 200 to the first conductive pin 310 and the negative terminal to the second conductive pin 320, and the second connection connects the positive terminal of the measuring apparatus 200 to the second conductive pin 320 and the negative terminal to the first conductive pin 310. It will be appreciated that the order of the two splices may be reversed. Since the odd relays 120 of the relay set 110 are electrically connected to the positive pole (i.e., to the first voltage interface 140 and the first current interface 150), the even relays 130 of the relay set 110 are electrically connected to the negative pole (i.e., to the second voltage interface 160 and the second current interface 170). Thus, the control unit 500 turns on and off the odd relay 120 and the even relay 130, so that the impedance between every two conducting pins can be measured twice by two different positive and negative connections.

It will be appreciated that if no device such as a diode, a transistor, or a MOS transistor is included between the two conductive pins, the impedance values measured by the first and second switches are the same when measuring impedance.

Referring to fig. 2, in an embodiment, the impedance measuring system 1000 further includes an interposer 400. The interposer 400 is electrically connected between the relay board 100 and the product 300. The interposer 400 has a number of pin receptacles 410. The number of pin sockets 410 is equal to or greater than the number of conductive pins of the product 300. For example, in the present embodiment, the interposer 400 has three pin sockets 410 for receiving the first conductive pins 310, the second conductive pins 320, and the third conductive pins 330 of the product 300, respectively. Each of the pin sockets 410 is electrically connected to one of the relay sets 110, for example, electrically connected to the first channel 121, the second channel 122, the third channel 131, and the fourth channel 132 of the relay set 110.

It can be understood that since each conductive pin of the product needs to be simultaneously connected to the corresponding first channel 121, second channel 122, third channel 131 and fourth channel 132 during measurement, the interposer 400 is configured such that each conductive pin only needs to be electrically connected to one of the pin sockets 410 during measurement, thereby facilitating connection.

In this embodiment, the number of the conductive pins is n, and n is a positive integer greater than or equal to 2. The control unit 500 performs n × n-1 channel switching, and obtains n × n-1 impedance data after measurement and recording.

Referring to fig. 3, in one embodiment, the impedance measuring system 1000 further includes a display unit 600 for displaying the measured impedance data. The display unit 600 is electrically connected to the control unit 500.

Referring to fig. 4, fig. 4 is a schematic diagram illustrating impedance data measured by the impedance measuring system 1000. The impedance data may be displayed on the display unit 600. As shown in fig. 4, the horizontal axis shows the conductive pins connected to positive electrodes, such as the first voltage interface 140 and the first current interface 150. The vertical axis shows the conductive pins connected to negative poles, such as the second voltage interface 160 and the second current interface 170. Since the measurement system measures the impedance between two conductive pins, it is not necessary to connect the positive and negative electrodes to the same conductive pin, so the data on the diagonal line in fig. 4 is the default. By providing the display unit 600, display of impedance data is realized.

In one embodiment, the impedance measuring system 1000 further includes a fixing mechanism (not shown) for fixing the relay board 100 and the interposer 400, so that the relay board 100 is always in a stable state during the impedance measurement process, thereby avoiding measurement errors caused by unstable interface contact.

Finally, it should be noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An impedance measurement system for measuring impedance between conductive pins of a product, the impedance measurement system comprising:

2. The impedance measuring system of claim 1, wherein each of the relay groups comprises an odd relay and an even relay, the first channel and the second channel constitute the odd relay, and the third channel and the fourth channel constitute the even relay.

3. The impedance measuring system of claim 2, comprising a control unit for controlling the opening and closing of the first, second, third and fourth channels of each of the relay groups, and the control unit opens only the odd relays of one of the relay groups and the even relays of another one of the relay groups at a time and closes the other odd relays and the even relays.

4. The impedance measuring system of claim 2, wherein the product comprises at least a first pin and a second pin, and when measuring the impedance between the first pin and the second pin, the control unit switches two channels, and when switching for the first time, opens the odd relay of the relay set electrically connected to the first pin, and opens the even relay of the relay set electrically connected to the second pin, and closes the even relay of the relay set electrically connected to the first pin and the odd relay electrically connected to the second conductive pin, and when switching for the second time, opens the even relay of the relay set electrically connected to the first pin, and opens the odd relay of the relay set electrically connected to the second pin, and closes the odd relay electrically connected to the first pin and the even relay electrically connected to the second conductive pin.

5. The impedance measuring system of claim 2, wherein the number of the conductive pins is n, and the control unit is configured to perform n × n-1 channel switching to obtain n × n-1 impedance data, wherein n is a positive integer greater than or equal to 2.

6. The impedance measurement system of claim 1, further comprising a display unit for displaying the tested impedance data.

7. The impedance measurement system of claim 1, comprising an interposer electrically connected between the relay board and the product, the interposer having a plurality of pin receptacles, each of the pin receptacles configured to receive one of the conductive pins of the product, each of the pin receptacles further electrically connected to the first channel, the second channel, the third channel, and the fourth channel.

8. The impedance measurement system of claim 7, further comprising a securing mechanism for securing the relay board and the interposer board.

9. The impedance measurement system of claim 1, wherein the meter is an impedance analyzer.

10. The impedance measurement system of claim 1, wherein the control unit is a computer.